Farkel, the reason I say I don't have a problem with it is that it would only replace what means of control they already have, ie:driver's licenses, id cards etc. It wouldn't be any different, when they find a way to shut you off, they shut you off and usually there's not much you can do about it.
On the other hand, it would make filling out forms easier, buying and paying bills. I spent 45 minutes the other day helping a neighbor apply for a rent tax refund online. I can just image how long it would've taken her had I not been there. How much time have you wasted throughout the years filling the blanks with the same info over and over. It annoys the hell our of me. In this day and age of technology I still have to start over everytime, c'mon. Pretty ridiculous if you ask me.
It could help solve murders, find victims faster, track criminals, etc. It would be a felony to tamper with it or remove it. I understand the privacy issue, but really, do we really have privacy now without it?